Lock.



PATENTED FEB. 24, 1903.

W'. S. OBERHOLTZER.

LOCK.

APPLICATION FILED MAY 27, 1902.

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UNITED STATES PATENT OFFICE.

WALTER OBERHOLTZER, OF MIFFLINTOWN, PENNSYLVANIA, ASSIGNOR OF ONE-HALFTO HENRY WV. SWEIGARROF LEWISTOWN, PENNSYLVANIA.

LOCK.

EtPECIFICATION formingpart of Letters Patent No. 721,322, dated February24, 1903.

Application filed May 27, 1902. Serial No. 109,222. (No model.)

of-Pennsylvania,have invented a new and use-- ful Look, of which thefollowing is a specification.

The invention relates to improvements in looks.

The object of the present invention is to improve the constructionof'door-locks and to provide a simple and comparatively inexpensive oneof great strength and durability, adapted to be readily arranged toenable it to be operated from the interior and exterior during theday-time and capable of being readily set to provide an efficientnight-latch for preventing operation from the exterior without a key.

Afurther object of the invention is to provide a lock of this characterin which the key will be reversible and adapted to operate the lock wheneither edge is at the top, so that it will not have to be placed in thelock in a par- 2 5 ticular position.

Furthermore, it is the object of the invention to provide a lock inwhich the bolt may be constructed larger than heretofore in order toafford greater strength and in which the knobs will be rigidlyinterlocked with the casing, so that they cannot wear out or becomeloose and fall off.

The invention consists in the construction and novel combination andarrangement of parts hereinafter fully described, illustrated in theaccompanying drawings, and pointed out in the claims hereto appended.

In the drawings, Figure 1 is a vertical sec tional View of amortise-lock constructed in accordance with this invention and shownapplied to a portion of a door. Fig. 2 is a horizontal sectional view ofthe same. Fig. 3 is a sectional view on the line 3 3 of Fig. 1. Fig. 4is a detail view of the bolt. Fig. 5 is a detail sectional view on theline 5 5 of Fig.

1. Fig. 6 is a sectional view on the line 6 6 of Fig. 5. Fig. 7 is adetail view of a portion of the face-plate of the lock, illustrating thearrangement of the outer arm or handle of the shaft for locking theouter push-button out of operation. Figs. 8, 9, and 10 are detail viewsof the fixed disks of the thimble of the lock. Fig. 11 is a sectionalview illustrating the manner of interlocking the knobs with the casing.the key.

Fig. 12 is a detail view of Like numerals of reference designatecorresponding parts in all the figures of the drawings.

manner.

The side plates of the casing are provided at opposite sides with innerand outer openings 5 and'6 of substantially the same configuration andhaving reduced portions 7 to receive inner and outer grooves 8 and 9 ofinner and outer knobs 10 and 11. The inner and outer knobs are providedwith slotted or bifurcated shanks 12 and 13, which are provided with thesaid grooves and which are introduced into the openings of thelockcasing before the lock is fully placed in the mortise of the door,so that when the lock is moved inward completely the grooved portions ofthe shanks of the inner and outer knob's'will be received within thereduced portions of the openings 5 and 6. The reduced portions of theopenings are provided with straight upper and lower edges, and thegrooves of the shanks of the inner and outer knobs are provided withstraight bottom or inner walls to engage the straight edges of thelock-casing, whereby the knobs will be rigidly interlocked with thecasing.

The

lock-casing is secured in the mortise of' the door by screws or othersuitable fastening devices which pass through perforations of theface-plate, and these fastening devices securely hold the knobs inengagmeent with the lock-casing, and there is no liability of the knobswearing out or becoming loose and dropping off.

The face-plate is prothe bolt in an extended position.

The inner end of the bolt is recessed or bifurcated at 17 to clear theshank of the inner knob, and the rods extend from the inner end of thebolt above and below the bifurcation, and their inner ends are arrangedin upper and lower guides 18 and 19. The upper rod extends slightlybeyond the upper guide, and the lower rod is extended considerably beyond the guide and is provided with a head 20 and is connected by a linkor rod 21 with an oscillatory arm 22, adapted to be operated by a key,as hereinafter explained. The link or rod 21 is provided with anangularly-disposed eye 23, which embraces the lower rod 15 and whichpermits the bolt to reciprocate independently of the key-operated arm22. The sliding spring-actuated bolt is retracted by a pair ofbell-crank levers 24 and 25, fulcrumed on a vertical pin or pivot 26.The bell-crank lever 24 is fulcrulned at one end on the pin or pivot andis connected at its angle by a pivot 27 with a link 28, and its otherend is engaged by a stem 29 of a push-button 30 of the inner knob 10.The pivot 27 is arranged in a slot 31 of the link 28, which is pivotedat its front or outer end in a recess 32 by a pin 33, and the slot 31permits the bolt to be operated independently of the inner knob. Thepush-button 30 is arranged in a cylindrical recess 34 of the inner knob,and the stem 29, which engages the bell-crank lever 24, is provided witha longitudinal slot 35, which receives a pin 36, mounted on the shank ofthe inner knob and extending through the longitudinal slot of the stem29 and limiting the movement thereof. The springs 16 and 17, whichactuate the bolt, hold the push-button 3O normally in an extendedposition. When the push-button is moved inward, the bolt is retractedand the knob may be readilygrasped to open the door.

The bell-crank lever 25 is fulcrumed at its angle on the pin or pivot26, and one arm is provided with a pivot 37, which is arranged in a slot38 of a link 39, located at the top of the bolt and pivoted in a recess40 by a pin 41 or other suitable fastening device. The other arm of thebell-crank lever 25 extends into the slot or bifurcation of the shank ofthe outer knob and is engaged by a stem 42 of a push-button 43,which isadapted to be received within a recess of the outer knob 11.

The stem is provided with a slot 44, through which passes a pin 45,which is mounted on the shank of the outer knob for limiting the inwardand outward movement of the pushbutton 43. When the outer push-button isforced inward, the bell-crank lever will be oscillated and the bolt willbe retracted. The outer push-button is locked out of operation by meansof a longitudinal shaft or rod 46, provided with inner and outer arms 47and 48, the outer arm 48 forming a handle and being arranged within arecess 49 of the faceplate of the lock. The inner arm is adapted to beswung downward by partially rotating the shaft or rod, and when it isswung downward it is carried into a slot 50 of the bell-crank lever 25,whereby the latter is locked against movement to prevent the outerpush-button from being forced inward. The slot 50, which is disposedtransversely of the lock, is located adjacent to the shank of the outerknob, and the inner arm of the rod or shaft is supported by the shank ofthe outer knob when it is in engagement with the bell-crank lever 25.The outer arm is provided with a projection or lug to enable it to bereadily operated, and the face-plate is provided with a curved openingcommunicating with the recess in which the outer arm is arranged andexposing the lug or projection to enable the same to be readily engagedby the finger. The inner arm of the shaft or rod is held againstaccidental movement to prevent it from being jarred from either of itspositions by means of a yielding catch consisting of a plate 51 andupright and horizontal flanges 52 and 53, having beveled outer edges.The plate or body portion of the catch is provided with a perforation toreceive the upper guide-rod, and it is engaged by the spring 16, whichholds the catch in the position shown in. Fig. 1 of the drawings, tosupport the inner arm 47 in an elevated position and out of engagementwith the bell-crank lever 25. When the rod or shaft is rotated to swingthe arm downward, the catch is forced inward against the action of theupper spring 16, and the said arm when in engagement with the slot ofthe bell-crank lever 25 is engaged by the beveled edge of the horizontalflange of the catch, and it is held in such position by the spring 16,so that there is no liability of the inner arm being accidentally thrownout of engagement with the bell-crank lever 25 or accidentally droppinginto such engagement. The beveled flanges, which are arranged at rightangles to each other, fit against the adjacent edges of the upper guide18, and the catch is thereby prevented from rotating on the upper rod ofthe bolt.

The oscillatory arm 22 is pivotally mounted on a plate or support 54,preferably by means of a disk 55, which is mounted in a circular openingof a support or plate 54, and the movement of the arm is limited by therod 21, which has its inner end 56 bent at an angle and arranged in acurved slot 57 of the plate or support 54. The arm is provided at itspivoted end with a pair of slots 58 to receive the sides 59 of theslotted inner end of a key 60, whereby when the key is partially rotatedthe arm will be oscillated to retract the bolt. Both sides of the keyare designed to be the same in order that it may be readily introducedinto the keyhole with either side uppermost.

Mounted upon the plate or support 54 is a cylindrical casing or thimble61, provided at its lower end, which is open, with a series of lugs 62and receiving a collar or ring 63, which is secured to the plate orsupport 54 by suitable fastening devices 64, blocks or pieces beinginterposed between the collar or ring to offset the lower end of thethimble or casing 61 from the support 54 to provide an aperture oropening for the arm 22. Within the thimble or casing is arranged aseries of.

disks which are provided at their outer edges with notches 66 to receiveinterior ribs 67, formed by exteriorly indenting or grooving the sidesof the casing or thimble, as clearly shown in Fig. 6. The exteriorgroove also receives the shanks 68 of pins 69, which engage theinnermost disk, as hereinafter explained. Any suitable number of disksmay be provided, and they are designed to prevent the operation of alock by a key not belonging to .the same or by the use of any otherdevice, such as a wire or the like. The disk 70 is provided at oppositesides with notches 71, extending outward from a central circular openingof less width than the key, and the latter is provided with oppositenotches 72 to receive the solid portions of the disk 70, lying betweenthe inner notches 71. This disk 70, which is fixed within the thimbleorcasing, will prevent the rotation of a key not provided with notches72. The disk 70 is spaced from the outer end ot the sleeve or thimble bymeans of spacing-disks 73, interlocked with the thimble or casing andprovided with central openings of the diameter of the key to permit thelatter to turn freely in them. The rotary movement of the key is limitedby a disk 74:, provided with a central opening of less diameter than thewidth of the key and having opposite recesses 75, receiving the sideedges of the key and formingopposite shoulders for engaging the same.The disk 74 is interlocked with the thimble or casing by the meansheretofore described. Within the series of disks is mounted a rotarypost 76, having reduced inner and outer ends, which are journaled in theouter end of the casing and in an inner disk 77, provided with a centralopening of the same diameter as the reduced inner end of the post. Thepost is provided with side grooves 78, and it has a slotted orbifurcatedouter end, the slot orbifurcation 79 permitting the key to be forcedinward, and the slot 79 of the post and the slot or bifurcation of thekey may vary in depth to change the character of the key and the lock,so that the key of one lock will not fit another. The grooves of thepost register with the slots of the arm 22, and the post is lockedagainst rotation by a' pair of pivoted tumblers 80, mounted on a disk 81and provided with inwardly-extending lugs 82, which project into thegrooves and which are adapted to be engaged by the side portions 59 ofthe slotted or bifurcated inner end of the key, said side portions 59being tapered and adapted to force the tumblers outward. The tumblers80, which are pivoted at their opposite ends by studs 88 of the disk 81,are engaged by spring 84, having curved portions extending'around thepivoted ends of the tumblers and interposed between the same and the.tons of the said knobs.

thimble or casing. The springs are curved, and they also engage studs orprojections 85. The springs are capable of a limited longitudinalmovement topermit the tumblers to be forced outward beyond the groovesof the rotary post by the key. The inwardly-extending portions or lugs82 of the tumblers will form stops and limit the inward movement .ofakey-not provided with a tapered portion. The disks are held together bymeans of aspring 86 of approximately circularform, interposed betweenthe bearing-disk 77 and the disk 81, as clearly shown in Fig. 5 of thedrawings. The door is designed to be providedwith an escutcheon-plate87, having a swiveled disk 88, provided with a slot 89.

It will be seen that the lock, which is adapted to be constructed eitheras a mortise or rim lock, possesses great strength and durability, asthe bolt is adapted to be constructed of an increased size and as theother parts are large in proportion and are supported by one another.The inner and outer knobs are rigidly interlocked with the lockcasing,and their slotted shanks receive and support the adjacent arms of thebell-crank levers, which are operated by the push-but- The lock isadapted to be operated at either the inner or outer side of a door bythe push-buttons, and the push-button of the outer knob is capable ofbeing readily locked out of operation, so that the lock can be operatedfrom the exterior by a key only. The lock mechanism proper isexceedingly simple in its construction; but

the key-operated mechanism iscomplicated,

and it is practically impossible to pick the lock.

\Vhat is claimed is- 1. In a lock, the combination of a casing providedat opposite sides with openings having reduced portions with straightside edges, inner and outer knobs provided with grooves having straightedges, the grooved portions of the knobs being adapted to fit in thereduced portions of the openings of the casing whereby the knobs arerigidly interlocked with the casing and held against rotation, a bolt,and means movable independently of the knobs operating the same,substantially as described.

2. In a lock, the combination of a casing provided at opposite sideswith openings havin g reduced portions with straight side edges, innerand outer knobs having slotted shanks arranged in the said openings andprovided with grooves having straight edges, the grooved portions of theshanks being arranged in the reduced portions of the openings,wherebythe knobs are rigidly secured to the easing, a sliding bolt, leversoperating in the slots of the shanks and connected with the bolts, andmeans mounted on the knobs and movable independently thereof forengaging the levers, substantially as described.-

3. In a lock, the combination of a casing, a sliding bolt, rodsextending inward from the bolt and guided on the casing, springsdisposed on the rods and engaging the bolt, a key-operated arm, and alink or rod extending from the said arm to one of the rods of the boltand slidably connected with the same to permit the bolt to moveindependently of the arm, and means for operating the bolt independentlyof the arm, substantially as described.

4. In a lock the combination with a sliding bolt, and knobs havingpush-buttons, of a pair of bell-crank levers fulcrumed on the casing andextending in opposite directions and having their opposite ends arrangedto be engaged by the push-buttons, and links connecting the bell cranklevers with the sliding bolt, substantially as described.

5. In a lock, the combination of a casing, a sliding bolt provided withrods guided on the casing, springs disposed on the rods and engaging thebolt, links connected With the bolt and having slots, levers fulcrumedon the easing and having pivots arranged in the slots of the links saidslots being adapted to permit the bolt to be operated independently ofthe levers, inner and outer knobs provided with push-buttons engagingthe levers, and a keyoperated arm connected with one of the rods,substantially as described.

6. In a lock, the combination of a casing, a sliding bolt, a leverconnected with the bolt and provided with a slot, a push-button foroperating the lever, and a rock-shaft having inner and outer arms, theinner arm being arranged to engage the slot of the lever, substantiallyas described.

7. In a lock, the combination of a casing, a sliding bolt, a leverconnected with the bolt, a rod or shaft having inner and outer arms, theinner arm being arranged to engage the lever, and means for actuatingthe lever, substantially as described.

8. In a lock, the combination of a casing, a sliding bolt, a leverconnected with the bolt and provided with a slot, a fixed knob having aslotted shank receiving the lever adjacent to the slot thereof, and arock-shaft provided with an arm arranged to engage the slot, said armbeing interposed between the shank of the knob and the lever when inengagement with the latter, substantially as described.

9. In a lock, the combination of a casing, a sliding bolt,bolt-actuating mechanism, a rod or shaft provided with an inner armarranged to engage the bolt-actuating mechanism, and anautomatically-operated spring-actuated catch provided with beveledflanges arranged to engage the arm of the rod or shaft to hold thelatter in either of its positions, substantially as described.

10. In a lock, the combination of a casing, a sliding bolt having a rod,a spring disposed on the rod, bolt-actuating mechanism, a shaft providedwith an inner arm arranged to engage the bolt-actuating mechanism, and acatch mounted on the rod and engaged by the spring and provided withmeans for engaging the arm of the shaft, substantially as described.

ll. In a lock, the combination of a casing, a sliding bolt having a rod,a rectangular guide receiving the rod, bolt-actuating mechanism, a shaftprovided with an arm arranged to engage the bolt-actuating mechanism,and a locking device mounted on the rod and engaged by the spring andprovided with beveled flanges arranged at right angles and supported bythe rectangular guide and arranged to be engaged by the arm of theshaft, substantially as described.

12. In a lock, the combination of a casing, a sliding bolt having a rod,a guide receiving the rod, bolt-actuating mechanisn, a shaft having anarm arranged to engage the boltactuating mechanism, a spring disposed onthe rod, and a catch supported by the guide and engaged by the springand provided with beveled portions arranged in the path of the arm ofthe shaft, substantially as described.

In testimony that I claim the foregoing as my own I have hereto aflixedmy signature in the presence of two witnesses.

WALTER S. OBERI-IOLTZER.

Witnesses:

WM. H. WREN, L. Jon KocH.

